Siemens 7ML5431 - Page 171

Diagnosing and troubleshooting
10.3 General fault codes
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
171
Code/
Icon
Meaning
Corrective Action
S: 37
* Measurement hardware problem. Repair required: contact your local Siemens representa-
tive
S: 38
* Failure in the device electronics. Repair required: contact your local Siemens representa-
tive
S: 43
* Factory calibration for the radar receiver has
been lost.
Repair required: contact your local Siemens representa-
tive.
S: 45
* No valid boot program detected: firmware cor-
rupt
Repair required: contact your local Siemens representa-
tive.
S: 48
*
User configuration is invalid. One or more of
parameters: Low Calibration Point, High Cali-
bration Point, Volume breakpoints, and/or Auto
False-Echo Suppression, are set to invalid
values.
• Reconfigure the unit.
• Ensure the difference between High Calibration Point
and Low Calibration Point is not less than or equal to
zero; do a Master Reset.
S: 49
* EEPROM corrupt. Repair required: contact your local Siemens representa-
tive.
S: 50
* EEPROM corrupt. Repair required: contact your local Siemens representa-
tive.
S: 51
* EEPROM corrupt. Repair required: contact your local Siemens representa-
tive.
S: 52
Fail-safe is activated. Possible causes:
1. hardware failure
2. memory failure
3. Fail-safe LOE timer expired– possible
causes: faulty installation, antenna material
buildup, foaming/other adverse process
conditions, invalid calibration range.
For 3:
• Correct configuration; ensure installation is correct;
• no antenna buildup;
• adjust process conditions to minimize foaming/other
adverse conditions;
• correct calibration range.
If fault persists, or for 1 and 2, contact your local Siemens
representative.
S: 53
* Configuration lost: one or more parameter
settings have been lost. This may occur after a
firmware upgrade causes user parameters to
be reset.
Restore user parameters using SIMATIC PDM.